{
  "$type": "site.standard.document",
  "coverImage": {
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  "description": "A wireless power transfer device includes power transmitting coils, first search coils, second search coils, and a position detection device. The position detection device outputs a pulse signal to the first search coils and the second search coils and receives an echo signal from a…",
  "path": "/patents/1385823",
  "publishedAt": "2026-06-04T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H02J50/90",
    "Panasonic Automotive Systems Co., Ltd."
  ],
  "textContent": "A wireless power transfer device includes power transmitting coils, first search coils, second search coils, and a position detection device. The position detection device outputs a pulse signal to the first search coils and the second search coils and receives an echo signal from a power-transferred device via the first search coils and the second search coils. The position detection device detects a position of a power receiving coil of the power-transferred device placed on a charging surface based on detection voltages of the echo signal in the first and second search coils. The position detection device sets, as deactivated coils, first and second search coils that are positioned within a range of a predetermined distance from the position of the power receiving coil when power is being transferred via any of the power transmitting coils to the power receiving coil.",
  "title": "WIRELESS POWER TRANSFER DEVICE"
}